Island



(No Model.)

' H. PETERSON.

PICK SHAFT.

No. 549,462. Patented Nov. 5, 1895.

I UNITED STATES PATENT OFFICE.

HENRY PETERSON, OF BRISTOL, RHODE ISLAND, ASSIGNOR OF TIVO-TIIIRDS TO EZRA DIXON AND EBER HILL, OF SAME PLACE.

PICK-SHAFT.

SPECIFICATION forming part of Letters Patent No. 549,462, dated November 5, 1895.

Application filed March '7, 1895. Serial No. 540,812. (No modeL) T0 ctZZ whom, it may concern.-

Be it known that I, HENRY PETERSON, of Bristol, in the county of Bristol and State of Rhode Island, have invented certain new and useful Improvements in Pick-Shafts; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to improvements in pick-shafts for looms.

One object of the invention is to so construct a pick-shaft that it will be more durable than those heretofore constructed.

Another object of the invention is to secure the roller on its shaft in a more durable and simple manner.

The invention consists in the peculiar construction of the pick-shaft and in the combination therewith of thenovel removable roller-arm.

The invention also consists in the means for securing the roller on its shaft.

The invention also consists in such other novel features of construction and combination of parts as may hereinafter be more fully described, and pointed out in the claims.

Figure 1 represents a View of the improved pick-shaft shown in connection with the picker-stick and with the eccentric for operating the pick-shaft through the roller. Fig. 2 represents an enlarged cross-sectional View of the pick-shaft near the bracket to which the roller-shaft is secured, showing the roller-shaft, the roller, and the roller-securing yoke in full. Fig. 3 represents an end view of the roller-shaft with the securing-yoke and pick-shaft. Fig. 4: represents a sectional view taken on a line a a, Fig. 3.

Similar numbers of reference designate corresponding parts throughout.

In operating pick-shafts the first and most sudden strain is exerted on the roller and its shaft by means of an eccentric to give a quick throw to this roller-shaft, whereby the pickshaft is rocked or rotated to swing the picker-arm and actuate the picker-stick through the connecting mechanism. The sudden strain to which the roller-shaft is subjected at its juncture withthe pick-shaft, being distributed over the pick-shaft and picker-arm,

has not the same detrimental effect that it has on the short roller-shaft and particularly at its juncture with the pick-shaft. In ordinary cases the breaking of any portion of the pick-shaft requires the removal of portions of the loom before the damaged pickshaft can" be removed and repaired, thus occasioning the stopping of the loom for a considerable time. Again, the usual custom has been to secure the roller in place 011 its shaft bya set-bolt screwing into the end of the rollershaft. From the constant and sharp strains to which the roller-shaft was subjected this bolt had a tendency to work loose and drop out.

My object in carrying this invention into practice has been to so construct a pick-shaft and its roller shaft or stud that from their peculiar construction they will be better protected from breakage in their usual operation, while should such damage occur to the roller shaft or stud in its main portion or at its point of juncture with the pick-shaft the roller-shaft so damaged may be readily re moved and replaced by a new shaft. This desirable feature is accomplished by forming on the pick-shaft a bracket-plate having a bearing-surface of considerable extent and upper and lower edges practically at right angles with this surface. The roller shaft or stud is formed in part with a bearing-plate which fits against the bracket-plate of the pick-shaft and lips which embrace the edges of the two, being secured together by a single bolt. To further strengthen the outer end of the roller-shaft, I provide a peculiar yoke having a pin fitting into a socket in the end of the roller-shaft. The yoke forms a device for preventing the removal of the rollersleeve, curving partially around the same so as not to obstruct its rotation and in a position where it will not be struck by the eccentric, and, being fastened by the bolt which fastens the roller-shaft to the pick-shaft, serves as a brace for the outer end of the roller shaft or stud, as well as a device for holding the roller in place, and the fastening of the yoke, being not subjected to the same shocks as if it were at the end of the rollerarm, has not the same tendency to loosen.

In the drawings, 5 represents the pick-shaft, which is adapted to be journaled in bearings in the usual manner. From the pick-shaft extends the picker-arm 6, by which the pickerstick 7 is actuated through any ordinary connecting mechanism, such as a picker-strap S. Formed in part with the pick-shaft is the bracket 9, mainly depending below the shaft, but having a bearing-surface extending to the upper portion of the shaft, the upper and lower edges of the bracket extending at practically right angles with its surface. Through the lower portion of the plate is form ed a perforation to receive a bolt.

The tapering roller-shaft or stud has the socket 10 and the base 10 which is formed in part with the clamping-plate 11, having the upwardly-turned edge 12 for engaging the lower edge of the bracket-plate 9 and the lip 13 for engaging the upper edge thereof. Through the lower portion of this plate 11 is a perforation, which registers with the perforation in the plate 9. Through these plates is passed the bolt 14, which securely fastens the plates together at a point below the plane of pressure 011 the roller-shaft.

On the roller-shaft is journaled the usual antifriction or roller sleeve 15, shaped in the ordinary manner to best receive the thrust or pressure of the eccentric 1G, by means of which the roller-sleeve is suddenly struck to rotate or rock the pick-shaft and to actuate the picker-stick. This sudden blow exerted on the roller has a tendency to throw the same toward the end of the shaft, while at the same time the roller revolves. If, therefore, the securing device for holding the roller on its shaft consists of a headed bolt screwed into the end of the shaft, the rotation of the roller in contact with the bolt-head will act to unscrew the bolt from the shaft and the rollersleeve will gradually work off its shaft.

To prevent the working of the roller-sleeve from off its shaft, I provide a bent yoke 17, having its ends 18 and 19 lying in parallel planes, while their axes are in different planes, also parallel. The end 18 is of larger diameter than the end of the shaft 10, and from it extends the pin 20, which is engaged in the socket 10 of the shaft 10. In the plane of the end 18 the yoke-arm 17 extends considerably beyond the circumference of the roller-sleeve 15. The yoke then extends to ward the pick-shaft, curving downward until it meets the end 19, which is perforated to receive the bolt 14 and is secured thereon by the bolt-nut in a position where the unscrewing of the nut is not caused by the working of the roller-sleeve. It will also be seen that the shape of the yoke and the manner of its securing will have a tendency to resist the pressure exerted on the outer end of the rollershaft.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination with the shaft 5 having the bracket-plate 9 furnished at its upper end with the squared shoulder and at its lower portion with a comparativelythin edge, of the clamping-plate 11 having the lip 12 for partially cmbracin g the lower edge of the bracketplate and the lip 13 for engaging the upper squared shoulder, the shaft 10 formed in part with this plate, the bolt 14 for securing the plates 9 and 11 together, the roller-sleeve 15 rotatable on the shaft 10, and means for preventing the longitudinal movement of this sleeve.

2. The combination with the pick-shaft, the

roller-shaft or stud having a socket in its outer end, and a roller-sleeve on the shaft or stud, of a yoke having an end furnished with a pin engaging in the socket of the roller-shaft, said yoke curving outward from said end then inward and secured at the junction of the pick-shaft with the roller-shaft.

3. The combination with the shaft 5 having the bracket-plate 9, of the shaft 10 having the socket 10, the base 10 and the clampingplate 11 having the lips 12 and 13, the bolt 14: for securing the plates 9 and 11 together, the roller-sleeve 15 rotatable on the shaft 10, and the yoke 17havin g the end 18 furnished with the pin 20 engaged in the socket 10, and the end 19 secured on the bolt 1%, as and for the purpose described.

In Witness whereof I have hereunto set my hand.

HENRY PETERSON.

\Vitnesses:

JOSEPH A. MILLER, J12, M. F. .iLIGH. 

